Avalanche Forecast
Issued: Dec 25th, 2012 3:00PM
The alpine rating is Wind Slabs and Deep Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Fair - Timing, track, or intensity of incoming weather is uncertain on Thursday
Weather Forecast
Wednesday: Light SW winds. Strong arctic outflow winds in the valleys. Alpine temp -8. A few cm snow.Thursday: Light SW winds. Alpine temp -7. Moderate snow.Friday: Moderate to strong SW winds. Alpine temp around -6. Moderate snow.Â
Avalanche Summary
 Several natural size 1-2 loose dry and thin slab avalanches failed in terrain features wind-loaded by outflow (down-valley) winds over the past few days. Explosives triggered size 2-3 slabs which failed near the ground in facets last weekend.
Snowpack Summary
Wind slabs and cornices have developed on a fairly widespread basis and may be found on many slopes due to variable wind directions. Surface faceting is likely to continue while the weather remains cold. A layer of surface hoar buried in the upper metre of the pack has been observed in the Shames backcountry. The mid-pack is generally well settled. Near the base of the snowpack, a crust/facet layer continues to give hard, sudden results in snowpack tests. This weakness is unlikely to be triggered by a single person, but it remains possible with a very heavy load (e.g. cornice fall) or from a thin-spot trigger point.
Problems
Wind Slabs
Aspects: North, North East, East, South East, South, South West.
Elevations: All elevations.
Likelihood
Expected Size
Deep Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 26th, 2012 2:00PM